I'm planning possibly the oddest custom this side of Radicons. I, Sage o' G-fruit, is planning.... Doctor Who crossovers. The first two I'm going to be doing is Tenth Doctor/TARDIS and Dalek/Dalek Ship. Any ideas for bases? I know what figure in robot mode is going to be my Dalek base, need a base for alt mode, and I was thinking of using a Star Wars Crossover figure for a Doctor base. Could I also get an estimate of how much a custom like this would cost, and some ideas from the best customizers around?